Emanuel andbews



(No Model.)

B. ANDREWS;

' SAW.

Patented Apr. 7. 1885.

41 PUERS. pmoumriwr. via-mum" n c UNITED STATES PATENT QFFIc-E EMANUELANDREWS, OF WILLIAMSPORT, PENNSYLVANIA.

SAW.

SPECIFICATION forming part of Letters Patent No. 315,374, dated April ,71885.

Application filed February 9, 1885. (No model.)

To all whom it may concern.-

Be it known that I, EMANUELANDREWS, of Williamsport, in the county ofLycoming and State of Pennsylvania, have invented a new and usefulImprovement in Saws, and I do hereby declare that the following is afull and exact description of the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon.

The improvements involved in this application relate particularly tomeans for removably attaching saw-blades to the frames of meat and metalsaws, and to means for tightening and loosening such saw-blad es and thenovelty lies in the construction and combined arrangement of suchdevices, together with the construction of the back or frame of the saw,all as more fully hereinafter described and claimed.

To better comprehend my improvements and the manner of combining themwith the saw blade and frame, attention is invited to the accompanyingdrawings, in which-- Figure 1 is a side View of the saw with a bladeapplied and tightened by devices constructed in accordance with mypresent invention; Fig. 2, details of these devices and the saw-blade;Fig. 3, a detail of the back or frame of the saw, and Fig. 4 amodification of the tightening device.

Similar letters refer to corresponding parts in the several views.

A denotes the handle, and Aahandle casting, with an upper socket, a, anda lower socket, a all constructed and combined in a like manner to thesame parts described and referred to in two applications of mine of evendate herewith. B is the metal frame or back, of the usual form, havingits rear end removably inserted in the upper socket, a, of thehandle-casting A, and having its outer end, 0, made fiat, and providedwith a set-screw or rivet, (1, having a head preferably of oblong shape.The saw-blade (l is provided near one end with an oblong slot oropening, 6; but if the head of the screw or rivet d on the outer end ofthe back or frame B be round, or of some shape other than oblong, thenthis slot or opening 6 should be made to correspond with the size andshape of the stem of such screw or rivet. The other end of this sawing,9, and to attach a blade of this construction I employ a combined shankand link, D and E, respectively, as shown in Fig. 2. This shank D, whichis to be inserted in the socket a on the lower end of the handle-castingA of the saw-handle,is screw-threaded externally on one end, and itsstem or bodyis otherwise constructed as set forth in relation to theshank described in the applications hereinbefore mentioned. The head ofthis shank'D is biblade isprovided with a similar slot oropenfurcated orformed with two ears, y g, between whichis pivoted theloop or tongueE,to which one end of the blade is removably attached. This loop ortongue E is of a similar construction to the one described in one of theapplications hereinbefore referred to-that is, it is preferably acasting formed with a. loop, f, having a flat extension, f, provided ator near its center with a set-screw or rivet, f which has a headcorresponding with the shape of the slots 6 in the saw-blade, or a headmade longerthan the diameter of said slots. This loop or tongue E ispivoted to its shank D by means of a bolt, E, passed through the ears 9g and the loop f, as clearly shown in Figs. 2 and 4 of the drawings. Thesaw-blade is applied to the frame or back B byattaching one end to itsscrew or rivetd through the me dium of the slot or opening 0 at thisend, and the opposite end of the blade is applied to the handle-castingA by'attachment to the loop E through the medium of the screw or rivet fand slot or opening 6 in the ways suggested in one of the applicationsreferred to. When this attachment has been made, and the shank D hasbeen inserted in the socket a of the handle, a thumb or other tighteningnut,

also be apparent that the head of the shank D could be somewhat changedby providing the same with slots out in the upper edges of its ears 9 gdown to and communicating with the holes for the bolt E, as shown inFig. 4. With this modification the loop E would be attached between thebifurcated head of the shank by mounting the bolt E in its bearingsthrough the slots 9 9.

As before mentioned in one of the applications referred to, theseattaching and tightening devices may be used with any style of frame andhandle suitably adapted to properly accommodate them.

I am awarethat saw-blades with open slots near their ends for detachablysecuring sawblades to their frames are not new with me, and

I wish to disclaim the same, as such open slots naturally weaken suchsaw-blades, and I wish to obviate such objection by the use of closedslots in the ends of the saw-blades.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s

1. In a saw of the character described, the combination of the sawblade0, provided at one end with a closedv slot for removable attachment tothe outer end of the frame, and a straining-shank, D, connected with theinner end of the frame and removably attached to the inner end of saidblade, substantially as described.

2. In a saw of the character described, the combination of the back orframe having a flat outer end, the saw-blade 0, provided near each end'witha slot, 6, the shank D, having a bifurdated head,the loop or tongueE, pivoted to the head of said shank, and screws or rivets for attachingthe saw-blade to said back 13, and loop or tongue E, substantially asdescribed.

3. In a saw of the character described, the combination of the handle AA, the back or frameB, having a flat outer end, 0, provided with aset-screw, d, having an oblong head, the saw-blade 0, provided with anoblong closed slot, 6, near each end, the shank D, having a bifurcatedhead and provided with a nut, D, and the loop or tongue E, its screw orrivetf and bolt E, substantially as described and shown.

In testimony whereofI affix my signature in presence of two witnesses.

EMANUEL ANDREVS.

